Combined fireless cooker and gas-range.



B. A. GEUR|NK. COMBINED ,FmELEss cooKER AND @As RANGE. APPLICATLON FILEDDEC. 19. 1913.

T939# Patented Dec. 5,1916.

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B. A. GEURINK.

COMBINED HRELESS cooKER AND GAS RANGE.

APPLICATION FILED DEC. I9, I9I3.

Patented Dec. 5, 12H6.

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BERNARD A. GEURINK, OF EAST CLEVELAND, OHIO, ASSIGNOR TO TI-IE TRENKAMPSTOVE ANI) MANUFACTURING COMPANY,

' 0F OHIO.

OF CLEVELAND, OHIO, A CORPORATION COMBINED FIRELESS COOKEB, ANDGAS-RANGE.

Specification of Letters Patent.

Patented Dec. 5, 1916.

T o all whom t may concern.'

Be it known that I, BERNARD A. GEURINK, a citizen of the United States,and a resident of East Cleveland, county of Cuyahoga, and State'of Ohio,have invented a new and useful Improvement in Combined Fireless Cookersand Gas-Ranges, of which the following is a specification, the principleof the invention being herein explained and the best mode in which Ihave contemplated applying that principle, so as to distinguish it fromother inventions.

The present improvements relate to a combined gas stove or range andheat retaining chamber constructed to constitute what is now generallyknown to the trade and the public as a tireless cooker, the constructionbeing such that it may be used alternately either as a range or simplyas a tireless cooker with equally good results.

Other features of my improvements relate to safety mechanism forpreventing laccidents which have been of quite common occurrence intireless cookers of the types now in use.

To the accomplishment of these and related ends said invention thenconsists of the means hereinafter fully described and particularlypointed out in the claim.

The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention, such d1sclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used.

Figure 1 is a front elevation of my invention partially sectioned toshow certain' details of the construction; Fig. 2 is a section on theline 2 2 in Fig. 1; Fig. 8 is a section on the line 3 3 in Fig. 2; Fig.4 is a view in perspective of Ione of the walls. of the heating chambershowing the baiiiing plates on the same; Fig. 5 is a similar view of thetop wall of the heating chamber; Fig. 6 is a side elevation showing amodiiication of the distributing or baffling means in the casing; andFig. 7 illustrates one of the spacing devices for maintaining the innerand outer casings in their proper positions.

From Fig. 1 it will be seen that the 1nvention is preferably included asa part of the familiar gas stove or range, although not limited to Yusein this connection. A. heating: chamber l is provided which is infclosed on its sides 2, top 3 and bottom 4 by a casing 6 which is spacedfrom the chamber along the sides mentioned. This casing 6 comprises twospaced walls 7 between which is packed a suitable insulating material 8such as asbestos, magnesia or mineral wool, either in pulpy or sheetform, the proper relation between the outer and inner walls beingmaintained by spacing devices 10 having a lthreaded socket at either endthrough which a suitable screw is passed, attaching the walls to thespacer7 the latter being centrally apertured to permit of theintroduction of a rod passing from the bottom of the casing to the top.In this way 'the casing can be tightly packed with the insulatingmaterial in case it is used in pulpy form without bulging the walls atany point.

In the center of the bottom of the outer casing 6 there is set anauxiliary casing or trough 12 in which is mounted a burner 13. Spacedfrom the top of this auxiliary trough, but beneath the heating chamber,is slidably mounted a dellecting plate 14, which may be moved for thepurpose of lighting the burner and which serves to deiiect the gaslaterally so that it will pass over the bottom surface 4 of the heatingchamber and then up the side walls 2 of the same. To secure a properheating effect on the heating chamber, I provide a plurality of ballingplates 15 in the space between the side walls of the heating chamber andof the casing, such plates extending across this space in a staggeredrelation and causing the gas to pursue a zigzag or tortuous passagearound the ends of said plates and then across the surface of the wall,repeating this operation until the gas has reached the top of the sidewalls when it is similarly directed by means of baffling plates 16placed on top of the heating chamber, across the same, finally beingpermitted to discharge from the space between the top of the casing andthe chamber through a vent or opening 17 at the rear of the same. Inthis way the heated gas is caused to pass over substantially the entiresurface of the bottom, sides and top of the heating chamber before it ispermitted to escape, the temperature thus secured being maintained bythe heat insulating properties of the packing in the outer casing. Thecourse of the 'aas is indicated by arrows n Figs. 4 and 5. The turnerits which 'le placca in the with a suitable fuel gas by Va pipe 18 pass-Vingthrough the front of the casing and convnected externally of thesame to a supply l conduit 19. In this pipe there is mounted a valvecontrolling the admission of the gas,

the valve being operated by means of a suitable handle 20 and beingconnected externally of its valve casing 21 by a short link 22 to a rod23 passing through the front of the casing and connected to an aperturedslide 24 reciprocably mounted upon the bottom of the burner casing 12.rIhe latter is provided, in its bottom, with a plurality of equallyspaced apertures 25 for the admission-of air for the burner and theapertures 26 in the slide are of the same vsize and are similarlyspaced. It will thus be seen that the slide in one position is adaptedto entirely close the apertures in this casing, thus shutting off thesupply of air from the burners and preventing the same-from operating.In another position the apertures in the slide are adapted to registerwith the apertures in the casing, thus admitting air for the burners.Attached to the other end of such slide 24.- s a rod 27 passing throughthe rear of the casing and loosely connected externally of the same to alever 28 pivotally mounted on a lug 29 attached to the rear of thecasing and pivotally and slidably attached at its upper end to a pin 30which is connected to a valve or door 31 closing the vent 17 in thecasing.V The connection between this `lever and the pin is by means of aVslot 11 formed in the former in which such pin may move pivotally andslidably which is necessitated by the pivotal action required in thevalve closing the vent.

' The operation of the device will be seen from the foregoingdescription and it will be noted that when the gas valve is opened,supplying gas to the burner 13, the slide 211 registers. with theapertures 25 in the auxiliary casing 12, thus supplying air while thevalve 31 controlling the vent is open and permits passage through thecasing of the heated gas produced at the burner. The device when. sooperating serves as a stove, in that food may be cooked inthe heatingchamber in the usual manner. When the temperature in the heating chamberhas v risen to a suitable point the gas valve may be closed, thusshutting off also the air supply and closing the vent, thus retaining inthe casing 6 about the heating chamber 1, Vthe hot gas which fills thespace between the same. The device then operates as a tireless cooker tocomplete the cooking of whatever food isfin the cooking chamber.

`In order to light the burner, it is first necessary to operate thehandle20 controlling the flow of gasy through the pipe 18. llltovementVof the handle` simultaneously 5 opens vent` l17- andmoves the slides 24DtO position to permit air to flow up around the burner. The burner maythen be lighted by the insertion, through the aperture 51, of a taper ormatch of sufficient length to extend past the end wall of the casing'12. By the positive connection between the various valves it isimpossible for the operator to light the burner 13 when the vent 17 fromthe casing is closed, which often causes accidents by reason of theunburnt gas which has accumulated in this casing, which is thenexploded. Similarly, it is impossible for a person to turn ofi' the gasto cause operation of the device as a cooker and forget to close thevent 17 which would permit the escape of the heated gases and cause thedevice to be inoperative. By placing the insulating material outside ofthe space for the heated gas between the casing and the chamber thisdouble operation is secured, which it would be impossible to attain werethe insulating material placed inside of the space for the heatedgases.V The burner construction which is here used has been found togive an extremely efficient heating result, although the features ofthis burner form in themselves no part of the present invention, aseparate application having been filed on this feature of theconstruction.

In Fig. 6 an alternative means for distributing the heated gas is shown.It consists of parallel plates 33 provided with rows of apertures 34placed in staggered relation. This plate will be placed between thewalls of the casing 6 and chamber 1 and will operate to break up the gasand distribute it across the wall surface of the chamber 1. Othersuitable mechanism may be provided to accomplish this same result ifdesired. Beneath the heating chamber 1 is disposed an oven 35 providedin its upper portion with downwardly directed burners 36 which aresupplied with gas from the pipe 1S by means of distributing pipes 37controlled by valves 40. The oven 35 is provided with a vent 38 whichopens into a conduit 39 inclosing the operating mechanism for the valve31 and vent 17, such conduit being extended to any suitable pipe orchimney. It will be seen that the oven may be operated irrespective ofthe use to which the heating chamber 1 is being put, although the twochambers discharge into the same passage.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means as claimed herein or the equivalentof such stated means be employed.

I therefore particularly point out and distinctly claim as my inventionIn a stove, the combination of an outer casing; ajheating chamberpartially inclosed therein and spaced therefrom, said casing having avent in the back of the same adjacent to the top; a valve controllingsuch vent; an auxiliary casing open at its top and mounted in saidfirst-named casing, said auxiliary casing extending from front to backacross said first-named casing and having a plurality of spacedapertures in its bottom for the admission of air; a burner mounted insaid auxiliary casing; a gas supply conduit connected to said burner; aValve controlling said conduit; a shutter slidably mounted upon thebottom of said auxiliary casing and adapted to control such apertures;connections between said shutter and said Valve in said conduit; andother connections between the rear end of said shutter and said Valvecontrolling such vent, said last-named connections including pivotallyconnected rods, one of such rods being connected to said shutter and theother being pivotally and slidably connected to said Valve controllingsuch vent; said connections being adapted to elect simultaneous openingand closing of said Valves and said shutter.

Signed by me, this 13th day of December, 1913.

BERNARD A. GEURINK.

Attested by- H. B. FAY, A. L. GILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

